Property and Equipment

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

Property and equipment consists of the following, in thousands of dollars:

	June 30, 2019			December 31, 2018
	(unaudited)
Lab equipment and furniture	$	9,133		$	8,995
Leasehold improvements	3,163			2,731
Software	2,212			2,181
Computer equipment	1,289			1,313
Construction-in-progress	193			94
	15,990			15,314
Less accumulated depreciation and amortization	(11,962		)	(11,219		)
Total	$	4,028		$	4,095

Depreciation and amortization expense on property and equipment was approximately $0.4 million and $0.7 million for the three and six month periods ended June 30, 2019, respectively, and approximately $0.5 million and $0.9 million for the three and six month periods ended June 30, 2018, respectively.

The Company performs its annual impairment assessment in the fourth quarter, or earlier if impairment indicators exist. As of June 30, 2019, there were no identified indicators of impairment.